vi/v_init.c

   1 /*-
   2  * Copyright (c) 1992, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * %sccs.include.redist.c%
   6  */
   7
   8 #ifndef lint
   9 static char sccsid[] = "$Id: v_init.c,v 8.16 1993/12/09 19:43:13 bostic Exp $ (Berkeley) $Date: 1993/12/09 19:43:13 $";
  10 #endif /* not lint */
  11
  12 #include <sys/types.h>
  13
  14 #include <errno.h>
  15 #include <stdlib.h>
  16 #include <string.h>
  17
  18 #include "vi.h"
  19 #include "vcmd.h"
  20 #include "excmd.h"
  21
  22 /*
  23  * v_screen_copy --
  24  *      Copy vi screen.
  25  */
  26 int
  27 v_screen_copy(orig, sp)
  28         SCR *orig, *sp;
  29 {
  30         VI_PRIVATE *ovip, *nvip;
  31
  32         /* Create the private vi structure. */
  33         CALLOC_RET(orig, nvip, VI_PRIVATE *, 1, sizeof(VI_PRIVATE));
  34         sp->vi_private = nvip;
  35
  36         if (orig == NULL) {
  37                 nvip->inc_lastch = '+';
  38                 nvip->inc_lastval = 1;
  39         } else {
  40                 ovip = VIP(orig);
  41
  42                 /* User can replay the last input, but nothing else. */
  43                 if (ovip->rep_len != 0) {
  44                         MALLOC(orig, nvip->rep, char *, ovip->rep_len);
  45                         if (nvip->rep != NULL) {
  46                                 memmove(nvip->rep, ovip->rep, ovip->rep_len);
  47                                 nvip->rep_len = ovip->rep_len;
  48                         }
  49                 }
  50
  51                 nvip->inc_lastch = ovip->inc_lastch;
  52                 nvip->inc_lastval = ovip->inc_lastval;
  53
  54                 if (ovip->paragraph != NULL &&
  55                     (nvip->paragraph = strdup(ovip->paragraph)) == NULL) {
  56                         msgq(sp, M_SYSERR, NULL);
  57                         return (1);
  58                 }
  59         }
  60         return (0);
  61 }
  62
  63 /*
  64  * v_screen_end --
  65  *      End a vi screen.
  66  */
  67 int
  68 v_screen_end(sp)
  69         SCR *sp;
  70 {
  71         VI_PRIVATE *vip;
  72
  73         vip = VIP(sp);
  74
  75         if (vip->rep != NULL)
  76                 FREE(vip->rep, vip->rep_len);
  77
  78         if (vip->paragraph != NULL)
  79                 FREE(vip->paragraph, vip->paragraph_len);
  80
  81         FREE(vip, sizeof(VI_PRIVATE));
  82         return (0);
  83 }
  84
  85 /*
  86  * v_init --
  87  *      Initialize vi.
  88  */
  89 int
  90 v_init(sp, ep)
  91         SCR *sp;
  92         EXF *ep;
  93 {
  94         size_t len;
  95
  96         /*
  97          * The default address is line 1, column 0.  If the address set
  98          * bit is on for this file, load the address, ensuring that it
  99          * exists.
 100          */
 101         if (F_ISSET(sp->frp, FR_CURSORSET)) {
 102                 sp->lno = sp->frp->lno;
 103                 sp->cno = sp->frp->cno;
 104
 105                 if (file_gline(sp, ep, sp->lno, &len) == NULL) {
 106                         if (sp->lno != 1 || sp->cno != 0) {
 107                                 if (file_lline(sp, ep, &sp->lno))
 108                                         return (1);
 109                                 if (sp->lno == 0)
 110                                         sp->lno = 1;
 111                                 sp->cno = 0;
 112                         }
 113                 } else if (sp->cno >= len)
 114                         sp->cno = 0;
 115
 116         } else {
 117                 sp->lno = 1;
 118                 sp->cno = 0;
 119
 120                 if (O_ISSET(sp, O_COMMENT) && v_comment(sp, ep))
 121                         return (1);
 122         }
 123
 124         /* Reset strange attraction. */
 125         sp->rcm = 0;
 126         sp->rcmflags = 0;
 127
 128         /* Make ex display to a special function. */
 129         if ((sp->stdfp = fwopen(sp, sp->s_ex_write)) == NULL) {
 130                 msgq(sp, M_SYSERR, "ex output");
 131                 return (1);
 132         }
 133 #ifdef MAKE_EX_OUTPUT_LINE_BUFFERED
 134         (void)setvbuf(sp->stdfp, NULL, _IOLBF, 0);
 135 #endif
 136
 137         /* Display the status line. */
 138         return (status(sp, ep, sp->lno, 0));
 139 }
 140
 141 /*
 142  * v_end --
 143  *      End vi session.
 144  */
 145 int
 146 v_end(sp)
 147         SCR *sp;
 148 {
 149         /* Close down ex output file descriptor. */
 150         (void)fclose(sp->stdfp);
 151
 152         return (0);
 153 }
 154
 155 /*
 156  * v_optchange --
 157  *      Handle change of options for vi.
 158  */
 159 int
 160 v_optchange(sp, opt)
 161         SCR *sp;
 162         int opt;
 163 {
 164         switch (opt) {
 165         case O_PARAGRAPHS:
 166         case O_SECTIONS:
 167                 return (v_buildparagraph(sp));
 168         }
 169         return (0);
 170 }